Spur Gear Pumps, Positive Displacement Pumps

Another type of positive displacement pump manufactured by Lear Romec is the
spur gear pump. The spur gear pump is well suited for use in oil, fuel, and
coolant applications.

A typical spur gear pump consists of a driven gear and another that runs free
contained within a pump housing. The rotation of the gears creates a partial
vacuum through the unmeshing of the gear teeth, drawing fluid into the inlet
side of the pump. As the rotating gears mesh together, an increase in pressure
occurs and the fluid is transferred between the rotating gear teeth, and the
pump housing, to the outlet side of the pump.